Model Comparison

Claude Sonnet 4.5 vs GPT-4.1 nano

Claude Sonnet 4.5 significantly outperforms across most benchmarks. GPT-4.1 nano is 34.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude Sonnet 4.5 outperforms in 4 benchmarks (GPQA, MMMLU, TAU-bench Airline, TAU-bench Retail), while GPT-4.1 nano is better at 0 benchmarks.

Claude Sonnet 4.5 significantly outperforms across most benchmarks.

Sat May 30 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-4.1 nano costs less

For input processing, Claude Sonnet 4.5 ($3.00/1M tokens) is 30.0x more expensive than GPT-4.1 nano ($0.10/1M tokens).

For output processing, Claude Sonnet 4.5 ($15.00/1M tokens) is 37.5x more expensive than GPT-4.1 nano ($0.40/1M tokens).

In conclusion, Claude Sonnet 4.5 is more expensive than GPT-4.1 nano.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Sat May 30 2026 • llm-stats.com

Claude Sonnet 4.5

Input tokens$3.00

Output tokens$15.00

Best providerAnthropic

GPT-4.1 nano

Input tokens$0.10

Output tokens$0.40

Best providerOpenAI

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-4.1 nano accepts 1,047,576 input tokens compared to Claude Sonnet 4.5's 200,000 tokens. Claude Sonnet 4.5 can generate longer responses up to 64,000 tokens, while GPT-4.1 nano is limited to 32,768 tokens.

Claude Sonnet 4.5

Input200,000 tokens

Output64,000 tokens

GPT-4.1 nano

Input1,047,576 tokens

Output32,768 tokens

Sat May 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Sonnet 4.5 and GPT-4.1 nano support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Sonnet 4.5

Text

Images

Audio

Video

GPT-4.1 nano

Text

Images

Audio

Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Sonnet 4.5

Proprietary

Closed source

GPT-4.1 nano

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4.5 was released on 2025-09-29, while GPT-4.1 nano was released on 2025-04-14.

Claude Sonnet 4.5 is 6 months newer than GPT-4.1 nano.

Claude Sonnet 4.5

Sep 29, 2025

8 months ago

5mo newer

GPT-4.1 nano

Apr 14, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

Claude Sonnet 4.5 has a knowledge cutoff of 2025-01-31, while GPT-4.1 nano has a cutoff of 2024-05-31.

Claude Sonnet 4.5 has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to GPT-4.1 nano (2024-05-31).

Claude Sonnet 4.5

Jan 2025

8 mo newer

GPT-4.1 nano

May 2024

Provider Availability

Claude Sonnet 4.5 is available from Anthropic. GPT-4.1 nano is available from OpenAI.

Claude Sonnet 4.5

Anthropic

Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

GPT-4.1 nano

OpenAI

Input Price:Input: $0.10/1MOutput Price:Output: $0.40/1M

* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Claude Sonnet 4.5

View details

Anthropic

Higher GPQA score (83.4% vs 50.3%)

Higher MMMLU score (89.1% vs 66.9%)

Higher TAU-bench Airline score (70.0% vs 14.0%)

Higher TAU-bench Retail score (86.2% vs 22.6%)

GPT-4.1 nano

View details

OpenAI

Larger context window (1,047,576 tokens)

Less expensive input tokens

Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature	Claude Sonnet 4.5	GPT-4.1 nano

FAQ

Common questions about Claude Sonnet 4.5 vs GPT-4.1 nano.

Which is better, Claude Sonnet 4.5 or GPT-4.1 nano?

Claude Sonnet 4.5 significantly outperforms across most benchmarks. Claude Sonnet 4.5 is made by Anthropic and GPT-4.1 nano is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Sonnet 4.5 compare to GPT-4.1 nano in benchmarks?

Claude Sonnet 4.5 scores MMMLU: 89.1%, AIME 2025: 87.0%, TAU-bench Retail: 86.2%, GPQA: 83.4%, MMMUval: 77.8%. GPT-4.1 nano scores MMLU: 80.1%, IFEval: 74.5%, CharXiv-D: 73.9%, MMMLU: 66.9%, Multi-IF: 57.2%.

Is Claude Sonnet 4.5 cheaper than GPT-4.1 nano?

GPT-4.1 nano is 30.0x cheaper for input tokens. Claude Sonnet 4.5 costs $3.00/M input and $15.00/M output via anthropic. GPT-4.1 nano costs $0.10/M input and $0.40/M output via openai.

What are the context window sizes for Claude Sonnet 4.5 and GPT-4.1 nano?

Claude Sonnet 4.5 supports 200K tokens and GPT-4.1 nano supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Sonnet 4.5 and GPT-4.1 nano?

Key differences include context window (200K vs 1.0M), input pricing ($3.00 vs $0.10/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 4.5 and GPT-4.1 nano?

Claude Sonnet 4.5 is developed by Anthropic and GPT-4.1 nano is developed by OpenAI.